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Dielectric Barrier Discharge Plasma (DBD) is one of cold plasma type. In this research, DBD plasma was used for reducing Chemical Oxygen Demand (COD) on industrial rubber waste. In the environment field DBD plasma is used as a water treatment and reduction of gas emissions (COx, NOx, and HC). In the development DBD plasma can be used as a wastewater treatment technology. Plasma is formed when a high...
This paper reports a scale treatment on purified terephthalic acid (PTA) productive wastewater in a 50L column form reactor by ultrasound enhanced ozonation. The degradation effects of three kinds of productive wastewater including inlet and outlet water from treatment works as well as accident wastewater are investigated. The results show that the ultrasound enhanced ozonation is an efficient way...
Both coagulation and SBR are effective techniques for treatment of papermaking wastewater. In this paper, the removal efficiencies of COD in papermaking wastewater are investigated by the processes of coagulation, SBR and coagulation-SBR combined processes. The effects of coagulant type, the dosage of coagulant, pH and stirring rate on treatment efficiency are explored in the paper. The results showed...
The treatment of chemical effluent is very complex with respect to its characteristics. To treat this effluent, different processes like biological, chemical and physiochemical can be applied based on its characteristics. Attempt was made to reduce COD and TSS. To obtain the optimum removal of COD and TSS, different combinations of coagulant and polyelectrolyte were applied at the laboratory scale...
This paper provided an energy saving process of uniform restricted aeration, analyzed the dynamic characteristic and conducted experimental test on tanning waste water. Results show that the microorganism activity have been improved greatly by enhancing the mass transfer. Under the conditions of inlet CODCr 427-750mg/L, BOD5 ranges from 224mg/L to 396mg/L, the outlet water is higher than industry...
The effects of UV-Fenton preoxidation on the biodegradability of several phenolic wastewaters were investigated based on the ratio of BOD5/COD. The results showed that the BOD5/COD ratios of phenol, hydroquinone, 2-chlorophenol and coal-gas phenolic wastewater were less than 0.30, except for phenol in moderate concentration of 300mg/L, which mean that the phenolic wastewaters were difficultly biodegradable...
A preliminary study using gamma radiation on coking wastewater samples was carried out. Chemical oxygen demand (COD), biochemical oxygen demand (BOD) and Ammonia-nitrogen content results were obtained at different doses (1.0, 3.0, 5.0 and 7.0 kGy). As increase of the absorbed doses, a decrease of COD and BOD was observed after irradiation, whereas at the doses of 5 kGy and 7 kGy, the residual concentrations...
In this paper, pretreating p-tertt-butylphenol formaldehyde resin synthesized wastewater has been carried out by the combined techniques of the ferric-carbon micro-electrolysis (abbreviated as FCME) and the Fenton reaction. The result shows that when the COD of the wastewater is between 3350~8370mg/L, pH=2.0 and the reaction time of FCME is 120 minute, the removal of COD is above 48% though the FCME...
Many standard chemical titration methods used for solve the serious water pollution problem have limitations such as secondary pollution and long detection time. This paper designs the COD monitoring system of upper and lower structure. Under-bit machine uses the SCM as the control core. The liquid crystal display simulation circuit is given in this paper. Signal detection is based on the properties...
Fundamental study of a high speed filtration system using HTS magnet for purifying the used wash water of drum has been made. This system consists of a magnetic seeding device and a magnetic filtration device. Since the wastewater is a mixture of various used wash water, the wastewater treatment is difficult to realize practically. For that reason, the wastewater is processed as industrial waste products...
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